I think it'd be smart to only have this pending workflow during the period where the signal to noise ratio can be affected the most: the first N hours after a post first hits the front page.
After that, either nobody is posting anymore or the relative impact of a snide comment is quite low (in terms of viewership and also relative to body of the thread.) Usually after a day or two people are just ping-ponging in their own private threads and there isn't much need for the endorsement bottleneck.
The place where this seems crucial is in determining which comments end up being the upvoted root comments for the main thread. These comments are upvoted early on and ultimately end up forming the shape of discussion from that point forward, so it's a good idea to ensure they aren't flamebait.
After that, either nobody is posting anymore or the relative impact of a snide comment is quite low (in terms of viewership and also relative to body of the thread.) Usually after a day or two people are just ping-ponging in their own private threads and there isn't much need for the endorsement bottleneck.
The place where this seems crucial is in determining which comments end up being the upvoted root comments for the main thread. These comments are upvoted early on and ultimately end up forming the shape of discussion from that point forward, so it's a good idea to ensure they aren't flamebait.